(05-02) 11:51 PDT LIVERMORE -- One man died and two other people were hospitalized Thursday after their sport utility vehicle rolled over in a crash that blocked all westbound lanes of Interstate 580 in Livermore for two hours, authorities said.

The victims were in a Land Rover heading west near Airway Boulevard around 8:15 a.m. when traffic ahead of them slowed to 35 mph, prompting the SUV to swerve to the left, said Officer Steve Creel of the California Highway Patrol.

The SUV began to fishtail, then rolled several times and came to rest on its wheels, Creel said.

Two men were ejected from the Land Rover and landed in the left lane. One was declared dead at the scene and another was taken to Eden Medical Center in Castro Valley with major injuries.

A third passenger, a woman, was seated in the Land Rover's cargo area, created when the back seat is folded down, Creel said. She was also taken to Eden Medical with major injuries.

It appears "two if not all three" victims were not wearing seat belts, Creel said. No other cars were involved.